Improvement in stop-motions for looms



UNITED STATES PATENT OFFICE.

IMPROVEMENT IN STOP-MOTION-S FOR LOOMS.

Specification forming part of Letters Patent No. 39,723, dated September 1, 1863.

To aZZ whom it may concern:

Be it known that I, GEORGE DRAPER, a resident of Milford, in the county of Worcester and State of Massachusetts, have made. a new and useful Improvement in the Stopping Mechanism of a Loom; and I do hereby declare the same to be fully described in the following specication and represented in the accompanying drawings, of which- Figure l is a top view, Fig. 2 a front elevation, and Fig. 3 a longitudinal section, of my invention in its construction and application to the arm or that part of a loom which serves to operate the shipperi My invention has reference to that part of a loom which is intended to arrest the opera tions of the loom whenever a shuttle, during its night across the race-beam, may fail to pass properly into the shuttlebox toward which it may be directed. It is Well known that lsuch a failure is apt to be productive of injury to the warps as well as to the loom unless the loom be stopped in its action in time to pre` vent such consequences.

Looms are usually provided with a shaft applied to the lay, and extending nearly its whole length, and having a finger or projection at each end. Each of these lingers rests against one of the shuttlebinders. From the said shaft there also projects what is usually termed a protector7 or daggen77 The ngers of the shaft are respectively pressed against the shuttle-binders by springs. In entering either shuttle-box the shuttle will press against andmove the binder thereof, so as to cause the linger next adjacent to such binder to be moved in a manner to turn or rotate the shaft a little, and thereby raise the dagger more or less. The dagger while so raised is elevated snfticien tly to pass just clear of the frog or abutment of the shipper-actuator, while the lay may be moving either backward `or forward, and provided the shuttle may have properly passed into its box; but in case the shuttle should not have properly entered a shuttlebox, the dagger will remain down in a lower position-that is, such a one as would cause it to be forced endwise against the frog when the lay may be in the act of moving backward or toward the breast-beam. The movement of the dagger against the frog will cause the shipper actuator to be forced against the shipper in manner to press it away from the device by which it may be held in position. Under such circumstances the shipper will be moved by its spring so as to produce a movement of the driving-belt from the fast to the loose pulley of the driving-shaft of the loom, thus ei'ecting the stoppage of the loom. The frog, as heretofore applied to the shipper'actuator, has been stationary relatively to it. Under these circumstances the frequent impacts of the dagger against the frog have a tendency to wear it, and particularly at the upper part of its front edge, where it is liable by reasonof such wear to become more or less rounded and injured. Such a wearing away of the frog is likely to cause the dagger to slip off the frog, and thus not properly force back the shipper-actuator.

` My invention is intended to prevent such wear of the frog or to obviate the difficulty arising therefrom; and it consists in the application and construction of the frog and its sup ports in such a manner as not only to cause the frog to rise, but be stopped or arrested in its rise during the impact of the dagger, the whole being substantially in manner and for the purpose as hereinafter described.

In the drawings, A denotes the shipperactuator as provided with a frog, B. This frog is movable within the actuator, and consists of a piece of metal having the form of atrapezoid in its cross-section, as shown in Fig. 3. It is placed within a seat or recess, a, made within the body of the actuator, and has its rear edge abutting against the rear part of such recess. The said recess is provided with stoppin g-lps b b, which rise against and above the two ends of the frog and project toward one another and over the frog, as shown in the drawings. These lips serve to arrest the upward movement ofthe frog under an impact of the dagger. That edge of the frog against which the dagger is to operate stands a little inclined to the direction of movement of the dagger, in order that immediately on the frog being struck by the dagger such inclination of the edge will serve to facilitate the upward movement of the frog relatively to the dagger. By the frog so moving upward and against the lateral extensions of the stopping-lips the upper part of its front edge, or that part against which the dagger first impinges, will be elevated so far before any movement of the shipperactnator can take place as to prevent the percussion of the dagger required to effect such movement from doing injury to said upper part. As soon as the dagger may depart from the frog, the latter, by the action of gravity, will be caused to fall into its lowermost position.

I do not claim a frog as usually employed with and applied to a shipper-actuator 5 but What I do claim as my invention or improvement is- The application and construction of thefrog and its supports in such manner as not only to cause the frog to rise, but to be stopped in its rise under impact or operation of the dagger, the Whole being substantially as and for the purpose as hereinbefore described.

GEORGE DRAPER.

Vitnesses R. H. EDDY, F. P. HALE, Jr. 

